if (window.Event) 
document.captureEvents(Event.MOUSEUP); 
function nocontextmenu()  

{
event.cancelBubble = true
event.returnValue = false;
return false;
}

function norightclick(e)    
{

if (window.Event)   
{

if (e.which == 2 || e.which == 3)
return false;

}
else

if (event.button == 2 || event.button == 3)
{
alert('© 2006 by BMV GmbH!')
}


{
event.cancelBubble = true;
event.returnValue = false;
return false;
}   
}
document.oncontextmenu = nocontextmenu;     
document.onmousedown = norightclick;